System of control.



PATENTED APR. so, 190?,

R. P. JACKSON.

SYSTEM OF CONTROL.

APPLIOATION FILED APR.13. 1905.

WITNESSES: GJTWLWM ATTORNEY UNITED STATES PATEN S @FFIGE INGHOUSE ELECTRIC MANUFACTURING QOMPANY, A CORPORATION or PENNsvLvAurA.

eve-tans Specification of Letters Patent.

Patented April 30, 1907.

Application at April 15,1905. Serial No. 255,440.

To all whom it may concern:

Be it known that I, RAY l JACKSON, citi-. zen of the United States, and a resident of Willcinsburg, in the county of Allegheny and 5 State of Pennsylvania, have invented a new and useful Improvement inSystems of Control, of which the following is a specification.

My invention relates to systems of control for electric motors, and particularly to such systems as embody voltage regulating de vices. The object of my invention is to provide means for causing two or more voltage rcgulators to operate synchr nusly; that is, so

I that all of the regulators Will supply app roxi mately the same voltage to the meters or other translating devices.

When two or more railway vehicles that are each provided with motors and voltage 20 regulators are connected to form a train, or when it is expedient or necessary to provide a single vehicle with two voltage regulators, it

is desirable that all of the motorsbe supplier with approximately the same voltage, in or- 5 der that they may operate at the same speed and develop the same torque. My invention provides means for causing equalization of the potentials at the terminals of all or such motors.

drawing illustrates a system embodying my invention.

Alternating current is supplied from a trol-- ley conductor 1 and a track rail 2 to motors 3 35 and l through a lowering transformer winding 5, voltage regulators 6' and 7, a control- I ling switch 8 and a reversing switch 9. lhe voltage regulators 6 and 7 may be of the form described in Patent No. 765,185, granted to 4 the Westinghouse Electric & Manufacturing Company, July 19th, 1904, upon an application filed, by Benjamin G. Lemme, or they may be of any other suitable form. The voltage regulators maybe operated by means 4 5 of pneumatic motors 10 and 11, the supply of the operating fluid thereto being governed by means of magnet windings 12, 13, 1e.- and 1-5,

or they may be operated by any other suitable means, such. as an electric motor the circuits 0 of which ma T be overned b the ma net windings 12, 13, 14 and 15.

'lhe'errcuits of the controlling wsndmgs are governed by means of relay devices 16 and The single figure of the accompanying 16 which respectively embody two-way 1 switches 11 and 1H and 18 and :3, ills movable contact terminals of the switches l 4' and 17 are mounted upon a pivot-ally supported armature 19 and the corresponding contactterminals oi the switches 18 and l8 are mounted upon a similar armature 1.9. The magnetiaable cores 20 and 21, upon which the armatures are mounted, are provided,respectively, with windings 22 and 23 and with windingsfie and 25 for normally controlling the operation of the armatures l9 and 19', and with magnet. windings 26 and 2? that maybe connected between the terminals of the motors 3 and t or between correspond ngpointsin the circuits of the motors and that may act either in oppositionto or in conjunction with one or more of the windings eaeaae adas. 1

When it-is desired to increase the yoltage applied to the motors 3 and 4, the windings '23 and 24 are energized and the switches 17 and 1S are clos-ed, thereby completing the circuits of the magnet windings 13 and 15 and causing the voltage regulators to operate in the forward direction. if the voltage supplied to one of the motors encecds that supplied to the other, the windings 26 and 27 will be energized and one will oppose and theother act in conjunction with one or the other of the windings 23 and 24, so that one or theother of the switches 17 and 18 s opened and the voltage regulatonwhich is delivering the highest voltage to ts corresponding motor is stopped until there is no difference of potential between the terminals of the motor or between the points in the motor circuits to which the windings 26 and 2'? are connected; lfor instance, it the vol tage applied to the motor exceeds that applied to the motor 4, a current will traverse windings 26 and 27 and the magnetizing ac tion of the winding 23 will be neutralized by that of the winding 26 and the switch 17 will open while the winding" 27 acts in con]unction with the winding 2% and the switch 18 is maintained in its closed position. As soon the voltage supplied to the motor 4 equals that supplied to the motor 3, the current through the windings 26 and 27 dies out and the winding 23 again effects closure of the switch 17.,

" e switches 17 and 18 that are operated sitions, the switch 8 is moved in the opposite direction to position i), a circuit will be established through the small portion 28 of the by means of the windings 22 and 25 control the'circuits of the magnet windings 12 and it, which govern the movement of the volregulators from the high voltage positrons to the low voltage positions. The operat on of the relay device, when the voltage applied to the motors is being decreased, is similar to that just described when the voltage is being increased and the voltages applied to the motors diflerf When the controlling switch 8 occupies position a, a circuit is established through a small portion 28 of the main transformer winding 5, contact finger 2 9, drum segments 30 and 3i, contact finger 32, windings 23 and 2d of the relay devices 16 and 16, which will he opereatd to establish circuits from the transformer 5 through the contact finger 29, drum segments 30 and 39, contact finger 40, switches 17 and 18, magnet windin s l3 and 15, contact fingers 38, rings 35, anr contact fingers. 37 back to the transformer 5. The voltage regulators. will then be moved from low voltage to high voltage positions. lf, when the regulators occupy high voltage potransforrner winding 5, contact finger 29, drum segments 30 and 33, contact finger 34. and the windings 22 and 25. The devices 16 and in will thereupon be operated to establish circuits from the transformer 5, through Lll contact finger 2 9, drum segments'3G and Si), cnntact finger 40, switches '1-7 and 18 magnet windings 12. and 14, contact fingers 36, rings 35 and contact fingers 37 to the transformer 5, and the voltage regulator is then moved from high voltage to low voltage po sitions.

' The circuits of the magnet windings 12, 13, 14 and 15 are further controlled by means of interlocking switches, each of which comprises a conducting segment 35 that is car ried upon th shaft of the regulator-operating means, one brushes 36, 37 and 38. When the regulator occupies the positions shown, t is in its 'owcst voltage position and-circuits can be cstal lished only through the magnet windings 13 and 15 which control th supply of voltage for forward, operation of the regulator, but the circuits of the windings l3 and 15 are interrupted when the gulator has been moved to such a position that the finger 37 is di engaged from thc conducting segment 35 by its having been brought opposite the open portion in this segment. When the regulator has been moved from its lowest voltage position only a slight amount, the brush 36 comes into engagement with the cohdi "rig segment and the windings 1.2 and H may then be energized when it is dc sired to again return to the lowest voltage position of the regulator. The interlocking switches also serve to limit the extent of cancer.

movement of the voltage regulator by inter rupting the circuits oi-the windings 12, 13, 14 and 15 when the high and low voltage positions have been reached,

While T have shown the voltage regulators as connected to a single transformer 5, it is evident that they may be connected to separate transformers and that they may be otherwise modified in construction and arrangement, if desired.

Other details of connections and arrangements of parts, as well as details of construetion of the relay devices 16 and 16", the voltage regulators, the interlocking devices operated thereby, and the regulator-o aeratating means may be'considerably varie from what is here specifically shown and described without departing from the spirit of the invention.

I claim as my invention:

1. The eombinationwith a plurality of translating devices, a plurality of voltage regulators, and means foroperating the same, of relay devices for governing said operatin means having windings that are connecte between corresponding points in the circuits of the translating devices, and windings that normally govern the operation of the relay devices.

2. The combination with a plurality of translating devices, a plurality of voltage regulators, and means for operating the same, of means for governing said operating means having windings that are connecte between corresponding points in the circuits of the translating devices, and windings that normally control the operation of the governing means.

3. The combination with a plurality of translating devices, a plurality of voltage.

regulators, and means for operating the same, of relay devices comprising switches,

magnetizable cores, windings that normally control the operation of the relay devices, and windings that are connected between corresponding points in the circuits of the translating devices.

4. The combination with a lurality of electrical translating devices and a plurality of voltage regulators, of means for operating the voltage regulators to supply the same voltage. to all of the translating devices.

5. 'lhe-combination with a lurality of electrical translatii'ig devices am a plurality of voltage regulators, of means for operating the voltage regulators, and means for automatically causing the regulators to supply the same voltage to all of the translating devices.

6. The cmnbimition with a )lurality of clcctrical translating devices and a plurality of voltage regulators, of means for operating the voltage regulators and means for automatically governing the operating means whereby the regulators are caused to supply 5 regulators, and

the same voltage to all e? the translating devices.

7. The combination with a plurality of translating devices, a plurality of voltage means for operating the same, of means for governing said operating means having windings that normally eontrol the operation thereof and windings that are conneetedbetween corresponding points ro in the circuits of the translating devices and the magnetizing ell'eets of which oppose and supplement, respectivelv, those ol the other windings.

In testimony whereof, I have hereunto suhsorihed my name this llth (lay of April,

RAY I. JACKSON.

Witnesses JonN D. PATON, I Bumm' HrNEs. 

